Plug cover



FIG. 1 is a front perspective view of a plug cover;

FIG. 2 is a front-end rear view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken line environmental showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a plug cover, as shown and described. 